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首页> 外文期刊>Molecular ecology >The Kuroshio Current influences genetic diversity and population genetic structure of a tropical seagrass, Enhalus acoroides
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The Kuroshio Current influences genetic diversity and population genetic structure of a tropical seagrass, Enhalus acoroides

机译：黑潮潮流影响热带海草Enhalus acoroides的遗传多样性和种群遗传结构

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摘要

Information on genetic diversity and differentiation of seagrass populations is essential for the conservation of coastal ecosystems. However, little is known about the seagrasses in the Indo-West Pacific Ocean, where the world's highest diversity of seagrasses occurs. The influence of sea currents on these populations is also unknown. We estimated the genetic diversity and population genetic structure and identified reproductive features in Enhalus acoroides populations from the Yaeyama Islands, Hainan Island and the Philippines. The Philippines are situated at the centre of the E.acoroides range, Yaeyama and Hainan are peripheral populations, and the Yaeyama population is at the northern limit of the species range. The powerful Kuroshio Current flows from the Philippines to Yaeyama. Genetic analyses using nine microsatellite markers indicated that reproduction of E.acoroides is mostly sexual. Clonal diversity does not decrease in northern populations, although genetic diversity does. However, the genetic diversity of the Yaeyama populations is greater than that of the Hainan populations. Significant genetic differentiation among most populations was evident; however, the Yaeyama and north-east Philippines populations were genetically similar, despite being separated by similar to 1100km. An assignment test suggested that recruitment occurs from the north-east Philippines to Yaeyama. The strong current in this region is probably responsible for the extant genetic diversity and recruitment patterns.
机译：关于海草种群遗传多样性和分化的信息对于保护沿海生态系统至关重要。但是，人们对印度洋-西太平洋的海草了解甚少，那里是世界上海藻多样性最高的地区。洋流对这些种群的影响也是未知的。我们估算了八重山岛，海南岛和菲律宾的En回钩形虫种群的遗传多样性和种群遗传结构，并确定了繁殖特征。菲律宾位于大肠杆菌的范围的中心，八重山和海南是外围种群，而八重山的种群位于物种范围的北部。强大的黑潮从菲律宾流向八重山。使用九种微卫星标记的遗传分析表明，大肠杆菌的繁殖主要是有性的。尽管遗传多样性确实有所减少，但北部种群的克隆多样性并未减少。但是，八重山种群的遗传多样性比海南种群更大。在大多数人群中遗传差异明显。但是，八重山和菲律宾东北部的人群在遗传上相似，尽管相距约1100公里。一项作业测试表明，从菲律宾东北部到八重山市进行了招募。该区域的强电流可能是造成现有遗传多样性和募集方式的原因。

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